/**
 * Converts a given value to a pretty-printed JSON string.
 *
 * If the value contains custom iterables (excluding arrays), they are converted to arrays
 * before serialization to ensure proper representation in the output JSON.
 *
 * @param obj - The value to serialize to JSON.
 * @returns A pretty-printed JSON string representation of the input value.
 */
export declare const toPrettyJson: (obj: unknown) => string;